During a dental examination, the dentist notices that the enamel on the back sides of Andrew's teeth has eroded, and the some of the teeth are decaying. Based on this information, the dentist suspects that Andrew

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The erosion of enamel on the back sides of Andrew's teeth and the decay of some of the teeth suggest that Andrew may be suffering from bulimia nervosa, a disorder characterized by binge eating followed by purging, which involves inducing vomiting. The stomach acid that comes up when one vomits is highly acidic and this acid can damage the enamel on teeth. Therefore, the dentist should ask about Andrew's eating habits and suggest that he seek medical help if necessary. A is incorrect because a vitamin D deficiency disorder, although it can lead to dental problems, is unlikely to cause erosion or decay on the back sides of the teeth. C is incorrect because although a diet high in fiber can contribute to dental erosion, it is not likely to affect only the back sides of the teeth. D is incorrect because irregular brushing, while it can contribute to dental problems, is unlikely to cause erosion on the back sides of the teeth.

During a Dental Examination, the Dentist Notices That the Enamel